Quick-change type heavy-load airtight mechanism

Abstract

The utility model is suitable for the technical field of automation, and provides a quick-change type heavy-load airtight mechanism. The quick-change type heavy-load airtight mechanism comprises a sealed cabin, one end of which is used for connecting a motion shaft and the other end of which is connected with a switching joint; the telescopic assembly sleeves the outer side of the sealed cabin, and the inner diameter of the end, close to the switching connector, of the telescopic assembly is larger than that of the end, close to the moving shaft; one end of the switching connector is sleeved with the sealed cabin through a first sealing ring, and the other end of the switching connector is connected with an external negative pressure executing mechanism; and the at least one extrusion rod penetrates through the sealed cabin, one end of the extrusion rod abuts against the limiting groove of the switching connector, and the other end of the extrusion rod abuts against the inner side of the telescopic assembly. Compared with the prior art, the high-speed air-tightness quick switching device has the advantages that the connectors can be quickly switched, good air tightness can be kept under any working conditions of severe conditions and high-frequency change of load direction and size, particularly, kinetic energy of an execution end can be stably absorbed during high-speed start and stop, and the stability and the air tightness of a mechanism are effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of automation technology, and in particular relates to a quick-change heavy-duty airtight mechanism. Background Technology

[0002] In industrial environments, motion axes are widely used in various mechanical equipment, such as CNC machine tools, packaging machines, and welding robots. For example, in the design of a multi-joint robot arm, each joint can be regarded as an independent motion axis; while on a planar XY positioning stage, there are two mutually perpendicular motion axes to complete the precise positioning task in two-dimensional space.

[0003] Negative pressure actuators carried at the ends of motion axes are often used for precision handling of target objects. To improve the versatility of the production line and quickly respond to different product operations, the actuator is often required to have a rapid switching function. Currently, the commonly available quick-change airtight mechanisms have complex structures and relatively simple operating conditions. Once the force is uneven or too large, air leakage will occur, and the stability of the equipment will decrease sharply when it operates at high speed. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a quick-change heavy-duty airtight mechanism, which aims to solve the problems of complex structure and air leakage in existing quick-change airtight mechanisms.

[0005] This utility model embodiment is implemented as follows: a quick-change heavy-duty airtight mechanism, the quick-change heavy-duty airtight mechanism comprising:

[0006] The sealed chamber has one end for connecting the motion shaft and the other end for connecting the switching connector.

[0007] The telescopic assembly is sleeved on the outside of the sealed chamber, with the inner diameter of the end near the switching joint being larger than the inner diameter of the end near the motion shaft.

[0008] The switching connector has one end connected to the sealed chamber via a first sealing ring, and the other end connected to an external negative pressure actuator.

[0009] At least one compression rod passes through the sealed chamber, with one end abutting against the limiting groove of the switching joint and the other end abutting against the inside of the telescopic assembly.

[0010] Furthermore, the telescopic component includes:

[0011] A retaining ring is fitted and snapped onto the outside of the sealed chamber;

[0012] The telescopic sleeve is fitted onto the outside of the sealed chamber, with the inner diameter of the end near the switching joint being larger than the inner diameter of the end near the motion shaft; the extrusion rod abuts against the inner side of the telescopic sleeve.

[0013] A spring is fitted onto the outside of the sealed chamber, with one end connected to the retaining ring and the other end connected to the telescopic sleeve.

[0014] Furthermore, the retaining ring includes:

[0015] The first retaining ring is fitted onto the outside of the sealing chamber and snaps into the groove of the outer ring of the sealing chamber.

[0016] The second retaining ring is fitted onto the outside of the sealed chamber, with one end abutting against the first retaining ring and the other end connected to the spring.

[0017] Furthermore, the inner side of the telescopic sleeve is provided with an inclined surface that allows the extrusion rod to slide into the sealed chamber. The inclined surface slopes from the end near the switching joint to the end near the motion shaft.

[0018] Furthermore, the sealed chamber is provided with at least one first positioning groove, and the corresponding position of the switching joint is provided with at least one second positioning groove, and the positioning pin positions and connects the first positioning groove and the second positioning groove.

[0019] Furthermore, an inner shoulder is provided inside the sealed chamber, and a rounded or chamfered corner is provided on the connector end of the switching joint, and the first sealing ring is provided between the connector end of the switching joint and the inner shoulder.

[0020] Furthermore, a first sealing groove is provided on the motion shaft, and a second sealing ring is provided in the first sealing groove. The motion shaft is inserted into the interior of the sealing chamber, and the shaft end face of the sealing chamber abuts against the second sealing ring.

[0021] Furthermore, the switching joint is provided with a second sealing groove at the end near the external negative pressure actuator, and a third sealing ring is provided in the second sealing groove.

[0022] The present invention provides a quick-change heavy-duty airtight mechanism that, compared with the prior art, can quickly switch joints and maintain good airtightness under any harsh conditions and high-frequency changes in load direction and magnitude. In particular, it can smoothly absorb the kinetic energy of the actuator during high-speed start-stop, effectively ensuring the stability and airtightness of the mechanism. Attached Figure Description

[0023] Figure 1 A cross-sectional view of a quick-change heavy-duty airtight mechanism provided for an embodiment of this utility model;

[0024] Figure 2 A cross-sectional view of a quick-change heavy-duty airtight mechanism provided for an embodiment of this utility model;

[0025] Icon labels:

[0026] 100. Sealed chamber; 110. First positioning slot;

[0027] 200. Telescopic assembly; 210. Retaining ring; 211. First retaining ring; 212. Second retaining ring; 220. Telescopic sleeve; 230. Spring;

[0028] 300. Switching connector; 310. Limiting groove; 320. Second positioning groove; 330. Second sealing groove;

[0029] 400. Extrusion rod;

[0030] 500, Motion shaft; 510, First sealing groove;

[0031] 600, positioning pin;

[0032] 700. First sealing ring;

[0033] 800, Second sealing ring;

[0034] 900, Third sealing ring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0036] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0037] like Figure 1 and 2 As shown, in one embodiment, a quick-change heavy-duty airtight mechanism is proposed. The quick-change heavy-duty airtight mechanism includes:

[0038] The sealed chamber 100 has one end for connecting to the motion shaft 500 and the other end for connecting to the switching connector 300.

[0039] The telescopic component 200 is sleeved on the outside of the sealed chamber 100, and the inner diameter of the end near the switching joint 300 is larger than the inner diameter of the end near the motion shaft 500.

[0040] The switching connector 300 is connected to the sealed chamber 100 at one end via the first sealing ring 700, and the other end is connected to an external negative pressure actuator.

[0041] At least one compression rod 400 passes through the sealed chamber 100, with one end abutting against the limiting groove 310 of the switching joint 300 and the other end abutting against the inside of the telescopic assembly 200.

[0042] In this embodiment, the telescopic component 200 is cylindrical and fits around the outside of the sealed chamber 100, allowing it to extend and retract vertically. The inner surface of the telescopic component 200 has a slope, allowing the compression rod 400 to slide relative to its inner surface. As the telescopic component 200 extends and retracts, its inclined inner diameter pushes the compression rod 400 closer to the interior of the sealed chamber 100 until it is pressed into the limiting groove 310 of the switching joint 300, thus achieving rapid switching. The external negative pressure actuator and the switching joint 300 are connected by threads, compressing the first sealing ring 700 to form a static seal, thus achieving the purpose of rapid switching between the external negative pressure actuator and the entire system. High-pressure gas is connected through the vertical air hole at the center of the entire system. The telescopic component 200 limits the position of the compression rod 400 to prevent backlash, ensuring the relative stability of the positions of the sealed chamber 100 and the switching joint 300. Here, the shape of the sealing ring is almost unaffected by the direction and magnitude of external forces, with minimal fluctuations, thus making the two almost perfectly static seals. This ensures sealing performance under different working conditions and loads, significantly improving motion stability. Therefore, compared with the prior art, this embodiment can maintain good airtightness under any harsh conditions and high-frequency changes in load direction and magnitude. In particular, it can smoothly absorb the kinetic energy of the actuator during high-speed start-stop, effectively ensuring the stability and airtightness of the mechanism.

[0043] In one optimization scheme, the telescopic component 200 is improved. The telescopic component 200 includes:

[0044] The retaining ring 210 is fitted and snapped onto the outside of the sealed chamber 100;

[0045] The telescopic sleeve 220 is fitted on the outside of the sealed chamber 100, and the inner diameter of the end near the switching joint 300 is larger than the inner diameter of the end near the motion shaft 500; the extrusion rod 400 abuts against the inner side of the telescopic sleeve 220.

[0046] Spring 230 is sleeved on the outside of the sealed chamber 100, with one end connected to the retaining ring 210 and the other end connected to the telescopic sleeve 220.

[0047] The retaining ring 210 includes:

[0048] The first retaining ring 211 is sleeved on the outside of the sealing chamber 100 and snaps into the outer ring groove of the sealing chamber 100;

[0049] The second retaining ring 212 is fitted on the outside of the sealed chamber 100, with one end abutting against the first retaining ring 211 and the other end connected to the spring 230.

[0050] In this optimized solution, the telescopic sleeve 220, which consists of a retaining ring 210, a spring 230, and a telescopic sleeve 220, has a simple structure, is easy to assemble and disassemble, and can be quickly installed.

[0051] In a preferred embodiment, the shape of the inner side of the telescopic sleeve 220 is improved. The inner side of the telescopic sleeve 220 is provided with an inclined surface that allows the compression rod 400 to slide into the sealed chamber 100. The inclined surface slopes from the end near the switching joint 300 to the end near the motion shaft 500.

[0052] In this optimized design, the inner diameter of the telescopic sleeve 220 is smaller at the top and larger at the bottom, with a smooth inclined surface in the middle to guide the extrusion rod 400, making the inward pushing of the extrusion rod 400 smoother.

[0053] In one optimized embodiment, the sealed chamber 100 is provided with at least one first positioning groove 110, and the switching joint 300 is provided with at least one second positioning groove 320 at the corresponding position, and the positioning pin 600 positions and connects the first positioning groove 110 and the second positioning groove 320.

[0054] In this optimized solution, the positioning pin 600 is used to prevent the switching joint 300 from rotating arbitrarily; the positioning pin 600 and the switching joint 300 are positioned to avoid contact and play a foolproof role during assembly. If rotated 180°, it cannot be installed.

[0055] In one optimized solution, the sealing structure is improved. An inner shoulder is provided inside the sealing chamber 100, and a rounded or chamfered corner is formed on the connector end of the switching joint 300. A first sealing ring 700 is provided between the connector end of the switching joint 300 and the inner shoulder. A first sealing groove 510 is provided on the motion shaft 500, and a second sealing ring 800 is provided within the first sealing groove 510. The motion shaft 500 is inserted into the sealing chamber 100, and the shaft end face of the sealing chamber 100 abuts against the second sealing ring 800. A second sealing groove 330 is provided at the end of the switching joint 300 near the external negative pressure actuator, and a third sealing ring 900 is provided within the second sealing groove 330.

[0056] In this optimized solution, multiple sealing sleeves are set up, so that the entire product mechanism is interlocked and rigidly connected, ensuring stable airtightness under heavy loads. Compared with the traditional structure, the load capacity has been significantly improved.

[0057] The various technical optimization schemes in the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The working principle of the quick-change heavy-duty airtight mechanism composed of all the above optimization schemes is as follows:

[0059] During installation, the connecting plate of the motion shaft 500 is inserted into the center hole of the sealing chamber 100 and connected by threads to press the first sealing ring 700 tightly, forming a static seal. The telescopic sleeve 220 and the shaft sleeve are fitted together on the sealing chamber 100. The second retaining ring 212 is positioned against the upper limit of the first retaining ring 211. The spring 230 is compressed between the second retaining ring 212 and the telescopic sleeve 220, allowing the telescopic sleeve 220 to be lifted upwards. During equipment operation, the telescopic sleeve 220 is naturally pressed down into place without jumping under the action of the elastic force.

[0060] During rapid switching, manually lift the telescopic sleeve 220 while simultaneously pulling out the switching connector 300. Three spherical compression rods 400 (preferably three in this embodiment, the specific number depending on actual conditions) in the radial plane retract under the action of the inclined plane, allowing the switching connector 300 to be smoothly pulled out. Then, align the new switching connector 300 with the two positioning pins 600 in the plane (preferably two in this embodiment, the specific number depending on actual conditions) and insert it. After axial alignment, the switching connector 300 completes radial positioning, ensuring no radial wobble during operation. Continue pushing the switching connector 300 upwards to its final position, and manually lower the telescopic sleeve 220 to its final position. Due to the effect of the inclined surface of the telescopic sleeve 220, the extrusion rod 400 moves towards the center until it squeezes the upper inclined surface of the switching joint 300. At this time, the vertical surface of the telescopic sleeve 220 provides a backstop support point for the spherical extrusion rod 400, so that the upper inclined surface of the switching joint 300 is squeezed and continuously subjected to an upward force. At the same time, the contact between the switching joint 300 and the plane of the sealing chamber 100 enhances the radial and axial stability. All of the above points ultimately make the first sealing ring 700 stably clamped between the sealing chamber 100 and the switching joint 300, which is very close to the static sealing effect, greatly improving the sealing reliability and the life of the sealing ring. The switching is now complete.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change heavy-duty airtight mechanism, characterized in that, The quick-change heavy-duty airtight mechanism includes: The sealed chamber has one end for connecting the motion shaft and the other end for connecting the switching connector. The telescopic assembly is sleeved on the outside of the sealed chamber, with the inner diameter of the end near the switching joint being larger than the inner diameter of the end near the motion shaft. The switching connector has one end connected to the sealed chamber via a first sealing ring, and the other end connected to an external negative pressure actuator. At least one compression rod passes through the sealed chamber, with one end abutting against the limiting groove of the switching joint and the other end abutting against the inside of the telescopic assembly.

2. The quick-change heavy-duty airtight mechanism according to claim 1, characterized in that, The telescopic component includes: A retaining ring is fitted and snapped onto the outside of the sealed chamber; The telescopic sleeve is fitted onto the outside of the sealed chamber, with the inner diameter of the end near the switching joint being larger than the inner diameter of the end near the motion shaft; the extrusion rod abuts against the inner side of the telescopic sleeve. A spring is fitted onto the outside of the sealed chamber, with one end connected to the retaining ring and the other end connected to the telescopic sleeve.

3. The quick-change heavy-duty airtight mechanism according to claim 2, characterized in that, The retaining ring includes: The first retaining ring is fitted onto the outside of the sealing chamber and snaps into the groove of the outer ring of the sealing chamber. The second retaining ring is fitted onto the outside of the sealed chamber, with one end abutting against the first retaining ring and the other end connected to the spring.

4. The quick-change heavy-duty airtight mechanism according to claim 2, characterized in that, The inner side of the telescopic sleeve is provided with an inclined surface that allows the extrusion rod to slide into the sealed chamber. The inclined surface slopes from the end near the switching joint to the end near the motion shaft.

5. The quick-change heavy-duty airtight mechanism according to claim 1, characterized in that, The sealed chamber is provided with at least one first positioning groove, and the corresponding position of the switching joint is provided with at least one second positioning groove. The positioning pin positions and connects the first positioning groove and the second positioning groove.

6. The quick-change heavy-duty airtight mechanism according to claim 1, characterized in that, The sealed chamber is provided with an inner shoulder, and the connector end of the switching joint is provided with a rounded corner or chamfer. The first sealing ring is provided between the connector end of the switching joint and the inner shoulder.

7. The quick-change heavy-duty airtight mechanism according to claim 6, characterized in that, The motion shaft is provided with a first sealing groove, and a second sealing ring is provided in the first sealing groove. The motion shaft is inserted into the sealed chamber, and the shaft end face of the sealed chamber abuts against the second sealing ring.

8. The quick-change heavy-duty airtight mechanism according to claim 7, characterized in that, The switching joint is provided with a second sealing groove at the end near the external negative pressure actuator, and a third sealing ring is provided in the second sealing groove.

Images